Pipe-screwing device.



F. e. DIEFENDORF.

PIPE SCREWING DEVICE.

APPLICATION FILED MAR. I7. 1913.

l 1 5O, 1 78. Patented Aug. 17, 1915.

574 Nm/ty ay j,

' 11 extends.

' split and provided with clamping flanges- 16-16. The bolts 17 are arranged.

FREDERICK e. DIEFENI'DORF, or ERInrErmsYLvANn-i.

: rirn-scanwine iJEvIoE.

I f specification of Letters Patent.

Patented Aug.17, ieia.

Application filed March 17, 1913. Serial No. 754,663.

To all whom it may concern:

Be it known that I, FREDERICK G. DIE- FENDOPF, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Pipe-Screwing De vices, of which the following is a specification. This invention relates to pipe screwing devices and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims. These devices are particularly designed for securing pipes together in trenches. In the modern method of securing such pipes together especially if the trench is deep, difiiculty is encountered by reason of the fact that the range of movement permissible with the tongs used for this purpose is very slight so that to screw the pipes together under such conditions is very tedious and expensive.

The object "of thepresent invention is to obviate this difiiculty. Y

The invention is illustrated in the accompanying drawings as follows Figure 1 is a plan view of the device. Fig. 2 is a side elevation of the same.

1 marks the pipe already laid and 1 a coupling on said pipe. A frame 2 forms one side of the clamp and the part 3 the opposite side of the clamp. These are connected by the bolts 4 extending through the ears 55 on the parts 2 and 3. The levers 6-are pivoted by means of the pins 7 in the tops of bolts and these have'the cam surfaces 8. By swinging the levers so as to bring the cam surfaces into play the frame 2 can be rigidly clamped to the pipe 1. An arm 9 extends from the frame 2 to a position over the pipe 1 which is the pipe which is being operated upon. The arm terminates in a bearing 10 in which the shaft A thrust collar 12 isarranged on this shaft and a worm 13 is formed on the lower end of the shaft. The worm 13 engages a worm gear 1 1. Thls gear 14: is

15-45 through these flanges and levers 18 are secured to the bolts by means of the pins 19. The levers have the cam surfaces 20 by the operation of which the two parts of the gear may be clamped to the pipe thread 1 which Theapipe 1 has the screw is intended to enter the coupling 1*. The

shaft 11 is provided with a hand wheel 2 1 and maybe of any length desired to carry the wheel 24 outof the trench; In operating the device the parts are clamped to the pipes and the end of the screw thread 1 brought to position to enter the coupling 1 By turningthe hand wheel 24.- the worm 18 may be made to operate on the gear 14 so as to rotate the pipe 1*, thus screwing the pipe 1 in the coupling 1*. It will be noted that the gear 14 is of sufficient width to permit of the end movement necessary by'reason of the end movement of the pipe 1 as it enters the coupling 1*. The worm gives sufficient power to set up the pipe with little efiort on the part of the workman and the rod" 11 being extended above the trench makes the operation of the device possible in a convenient position.

What I claim as new is 1. In apipe screwing device, the combination of a rotary gear; means for securing said gear to a first pipe; and means carried by the pipe to which thefirst pipe is to be secured for actuating said gear to rotate the first pipe with said gear, said means permitting the end movement of the first pipe as the screw advances 2. In a pipe screwing device, the combination of a rotary gear; means for securing said gear to a first pipe; and means clamped to and carried by a pipe to which the first "pipe is to be secured to sustain the torque frameto said second pipe; and devices carriedby said frame for actuating said gear, said'devi ces permitting an end movement of the first pipe.

4. In a pipe screwing device, the combination of a rotary gear; means for securing the gear to a first pipe; a frame carried by a second pipe to which the first pipe is to be secured; means for securing said frame to said second pipe; and a worm gear-care ried by said frame and operating on said gear.

5. In apipe screwingdevice, the combination of a rotary gear; means for securing the gear to a first pipe; a frame'carried by a second pipe to which the first pipe is to be secured; means for securing said frame to said second pipe; a WOIID. gear carried by 5 said frame and operating on said gear; and

a shaft extending from distance from said pipe.

said Worm to a H In testimony whereof I have hereunto set "my hand in the presence of two subscribing 7i Witnesses. 7

v FREDERICK G. DIEFENDORF.

Witnesses:

B. M. HARTMAN, H. G. LORD.

Copies of this patent may be obtained "for five cent s each, byadciressing the Commissioner of Patents,

Washington, D. C. r 

